A plant was placed in a beaker of blue-coloured water. After two hours, the white flowers on the plant turned blue. Which part of the plant was responsible for this observation?
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Worked Solution
Step 1: The blue water is absorbed by roots and travels up the stem.
Step [2-9]: Water-carrying tubes (xylem) transport water and minerals to all parts of the plant.
Step [2-9]: The flowers turn blue because the xylem delivered the dye there.
Correct answer: Water-carrying tubes
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